Applying template to XPath expression in XML Attribute

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March 30th, 2004, 08:56 AM

akbandara

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Applying template to XPath expression in XML Attribute

I am trying to use an XSL transformation on an XML document of the following form:

Code:

<?xml version="1.0" encoding="ASCII"?>
<uk.ac.ic.doc.part.partInfomodel:PARTInformationModel xmi:version="2.0" xmlns:xmi="http://www.omg.org/XMI" xmlns:uk.ac.ic.doc.part.partInfomodel="http:///uk/ac/ic/doc/part/partInfomodel.ecore" modelName="DSE Information Model">
  <managedTypes managedObjectTypeName="printer">
    <attributes attrName="status" attrType="String" attrValue="idle"/>
    <operations managedOpName="printDoc">
      <parameters varName="documentName" varType="String"/>
      <parameters varName="documentSize" varType="Integer"/>
    </operations>
  </managedTypes>
  <behaviourModels>
    <states stateName="SS1" model="//@behaviourModels.0"/>
    <states stateName="SS2" model="//@behaviourModels.0">
      <stateConstraints objectRefName="typePrinter" attrVarName="status" value="idle"/>
    </states>
    <transitions transitionLabel="TT1" transitionOp="//@managedTypes.0/@operations.0" toState="//@behaviourModels.1/@states.1" fromState="//@behaviourModels.1/@states.0"/>
  </behaviourModels>
</uk.ac.ic.doc.part.partInfomodel:PARTInformationModel>

Now, when processing the <transitions> tag in the XSLT, I would like to make use of information in the nodes referenced by the XPath expressions in the @transitionOp, @fromState and @toState attributes - ideally I would like to force the processor to apply the templates defined for those nodes.

Is there any way to do this? If not, could someone suggest a better way of cross-referencing elements in the XML document such that the cross-references can be processed using XSLT?

Thanks in advance for any help!

Cheers,

- Arosha

April 1st, 2004, 02:18 AM

bricker42

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What you really want here is probably xpointer. Barring that I'd suggest making the values of your attributes valid xpath and seeing if any of the exslt extensions will let you turn an attribute value into an expression.

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-james

April 1st, 2004, 07:45 AM

MattSidesinger

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The Xalan XSL transformer has an evaluate xpath function that will evaluate a given xpath expression.

Code:

<xsl:value-of select="xalan:evaluate($pathExpression)"/>

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